Background: Nosocomial infections (NIs) are considered the major and common healthcare problems in most healthcare settings at most of developing countries like Iraq, important to assess the nurses' knowledge level and identifying gaps of their knowledge about NIs. Objectives: To assess the nurses' knowledge about nosocomial infection, and to find out the relationship between nurses' knowledge about nosocomial infection and selected demographic variables. Methodology: A descriptive study was conducted at burns' centers and units in the middle Euphrates teaching hospitals. The study was carried out from (25th October 2017) to (1st June 2018), A purposive (non-probability) sample was selected (129) from nurses that working at burns' centers and units in the middle Euphrates teaching hospitals. The instrument was presented to (15) experts from several universities to be valid, the reliability of the instrument was determined through the implicated the Cronbach's Alpha, the reliability of this instrument was (r = 0.833). Results: The result of study was showed that the majority (69.8%) of nurses had (passed score) of knowledge regarding nosocomial infection in burns'units at middle Euphrates teaching hospitals.in addition, the present study pointed out there was a significant relationship between nurse knowledge and number of training courses about nosocomial infection. Conclusion: Nurses were pass knowledge in terms of nosocomial infections, prevention, control and precaution in patient care. Nurses age, gender, education, years of experience in-out burn unit have been not influenced their knowledge. Number of Nurses training courses have been affected their knowledge.

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Objectives: The COVID-19 pandemic is a major health crisis that emerged at the end of the first quarter of the 21st century and changed the lives of millions of people globally. Nurses have close contact with infectious patients; therefore, nurses need to obtain sufficient knowledge in this regard. They need to assess their level of knowledge about COVID-19 and explore their needs to enhance and improve their knowledge in order to be more qualified to fight this virus. This study intends to assess nurses’ knowledge regarding COVID-19 and to find out the differences in nurses’ knowledge about COVID-19 with regard to their demographic variables. Methods: A descriptive (cross-sectional design) study was conducted to assess nurses’ knowledge regarding COVID-19 in Al-Hilla teaching hospitals in Al-Hilla City, Iraq, from September 25, 2020, to February 20, 2022. Using a convenient sampling method, a sample of 200 nurses working at epidemic hospitals was selected. The data collection process began with a questionnaire, which nurses answered as a self-report (questionnaire). Then the questionnaires were collected from the respondents. The average time to fill out the questionnaire was between 10 and 20 minutes. Results: The findings indicate that most nurses (58%) had poor knowledge about COVID-19. There were significant differences in nurses’ knowledge about COVID-19 with regard to their educational levels (P<0.05) and experience in epidemiological wards (P<0.05). Also, there was no difference between nurses’ attitudes toward COVID-19 with regard to their experience in epidemiological wards (P>0.05), but there was a significant difference between nurses’ knowledge about COVID-19 with regard to their source of information about COVID-19 (P<0.05). Discussion: The present study revealed that nurses had moderate knowledge about COVID-19. They had poor knowledge related to the prevention of COVID-19, while they had poor knowledge as overall knowledge related to COVID-19.